**An Assessment of the Condition of Distribution Network Equipment Based on Large Data Fuzzy Decision-Making**

### **Ning Wang and Fei Zhao \***

School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071000, China; wangning@ncepu.edu.cn

**\*** Correspondence: zhaofei@ncepu.edu.cn; Tel.: +86-312-752-2909

Received: 29 November 2019; Accepted: 28 December 2019; Published: 1 January 2020

**Abstract:** As one of the most important components of power grid, a distribution network is the most vulnerable part in the face of various uncertainties, and influences the stability and economy of a power system. In this paper, the operational information, hardware information and human factors were considered, and a state evaluation model of multi-source information fusion was established. Based on big data fuzzy iteration method and a weighted expert library, a weighted distribution of multi-source information was obtained, and an equipment condition assessment was carried out reasonably. Taking the distribution transformer as an example, the assessment showed that fusion of multi-source information presented in this paper is more comprehensive, and has the ability to reflect the state of equipment. The method proposed in this paper can accurately judge the running state of distribution equipment based on all kinds of information, and provides a reference for the follow-up power marketing for the status assessment of the user equipment.

**Keywords:** distribution network equipment; condition assessment; multi information source; fuzzy iteration
